2564541006535 has 4 divisors (see below), whose sum is σ = 3077449207848. Its totient is φ = 2051632805224.

The previous prime is 2564541006481. The next prime is 2564541006541. The reversal of 2564541006535 is 5356001454652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2564541006535 - 2¹³ = 2564540998343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256454100649 + ... + 256454100658.

It is an arithmetic number, because the mean of its divisors is an integer number (769362301962).

Almost surely, 2^{2564541006535} is an apocalyptic number.

2564541006535 is a deficient number, since it is larger than the sum of its proper divisors (512908201313).

2564541006535 is an equidigital number, since it uses as much as digits as its factorization.

2564541006535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512908201312.

The product of its (nonzero) digits is 2160000, while the sum is 46.

The spelling of 2564541006535 in words is "two trillion, five hundred sixty-four billion, five hundred forty-one million, six thousand, five hundred thirty-five".